Drawing-pen



(N0 Model.)

G; BENNETT.

DRAWING PEN.

No. 400,178. Patented Mar. 26,1889.

mines yes;

N. FEYERS. mmmm n mr. wuhin mn. o. r.

INITED STATES ATENT' OFFICE.

GEORGE BENNETT, OF PHILADELPHIA, PENNSYLVANIA.

DRAWING-PEN.

SPECIFICATION forming part of Letters Patent No. 400,178, dated March 26, 1889.,

Application filed September 3, 1888. Serial No. 284,405. (No model.) I

tion of the nibs in another modification of the To all whont it nuty concern:

Be it known that I, GEORGE BENNETT, a subject of the Queen of England, residing at Philadelphia, .in the State of Pennsylvania, UnitedStates of America, have invented certain new and useful Improvements in Drawing-Pens, of which the following is a specification.

My invention relates to that class of drawing-pens known as right-line pens, rulingpens, (to; and the object of my improvements is to provide a pen that will produce at the will of the draftsman either a broad or a narrow line, that will be uniform in width with all other lines of their kind, without any adjustment of the nibs after once determining the width of the respective lines. This feature makes my invention a very valuable and labor-saving instrument to draftsmen in inking-in shadow lines. The custom with many draftsmen is to ink their drawings entire with narrow lines and afterward, setting their pens to a broader line, go over such lines required to be broadened. Other draftsmen make a practice of inking-in all shadow or broad lines as the work progresses by passing the pen twice over the same line, or by successively adjusting the'nibs of the pen to a broad or narrow line. Such methods destroy the uniformity of the lines which adds so much to the appearance of a drawing, besides consuming much time in the successive adjustment of the nibs. The utility of my invention at once becomes apparent, as by its use the draftsman can determine upon the width for the narrow and broad lines and adjust his pen accordingly. Then all the lines in a drawing may be inked-in successively, whether broad or narrow, without further adjustment of the pen, and consequently with uniformity.

My invention, being simple, adds but little to the cost of a pen, it is not liable to get out of order, and is easily cleaned.

I carry out my invention in'the manner illustrated in the accompanying drawings, in which- Figures 1 and 2 are front and side views of my improved drawing-pen. 'Fig. 3 illustrates the manner in which a narrow line is drawn, while Fig. 4 shows the manner of drawing a broad line with the pen. Fig. 5 is a modified form of pen, and Figs. 6 and 7 show the posiinvention.

Similar letters refer to similar parts in the several views. I

The blade at, being secured into a handle, is jointed at c with the blade I). Secured to one blade and pressing against the other blade is the spring f. This spring forces the blades together at the nibs g. Between the nibs g and the joint 0 is an adjusting or stop screw, e,which serves to keep the nibs apart any desired space. The upper end of the blade I) is formed as at h, to receive pressure from a finger of the hand, and between this point and the joint 0 is the adjusting or stop screw (1, to limit the space between the nibs g when they are forced apart.

The operation is as follows: Filling the pen with ink, the nibs are adjusted for the desired narrow line by means of the screw e. The nibs are then set to the broad line by regulating the screw d, so that when the blade I) is pressed at the space between the nibs 9 will be right to produce the required line. An entire drawing may now be inked-in without fur-.

ther' adj ustmeut of the pen, broad or narrow lines of perfect uniformity being produced at the will of the draftsman by pressing the upper portion of the blades together against the screw (Z to produce a broad line, or by allowing the spring f to force the upper portion of the blades apart until arrested by the screw 6 to produce a narrow line, the manner of using being clearly shown in Figs. 3 and 4. In Fig. 3 the finger is removed from the blade Z), (or may rest lightly on it,) and the spring f forces the adjustable stop-screw 6 into contact, the pen producing a fine or narrow line. In Fig. 4 the finger is pressing the adjustable stop-screw (1 into contact, the pen producing a broad line. In Fig. 5 the two blades are formed of one piece, with the nibs g closed to gether by the spring or elasticity of the blades. The nibs are set 'for the narrow lines by the adjustable stop-screw e and opened for the broad lines by the pivoted lever i being pressed against the adjustable stop-screwd, the operation being the same as before. Another way of getting two adjustments for the nibs is shown in Figs. 6 and 7. In this case thetwo blades may be formed in one piece, with the elasticity of the blades acting to open the nibs.

An adj listing-screw, j, having a shoulder at 7t and a smaller threaded portion, j, is tapped into one of the blades, and the reduced portion j passing through a clear hole in the other blade and provided with a nut, Z. In using the pen the screw j is adjusted so that when the blades are pressed together the shoulder 75 will bear against the other blade and keep the nibs apart sufficiently to pro duce the required narrow line. lhe nut l is then adjusted so that when the blades are released the space between the nibs will be right to produce the required broad line, the operation being entirely similar to the previous example, with the difference that to produce a narrow line pressure is applied to the blades, whereas in the first form pressure is applied to produce a broad line.

, While other modifications of my invention may be discovered, I have found in practice that the form shown in the first four figures in the drawings to be the most satisfactory, the other forms being substantially the same in action, but not possessing the same convenience and case in manipulation.

Having described my invention, what I claim, and wish to secure by Letters Patent, 1s-

1. A drawing-pen with blades having two adjustments for producing lines of two different widths, the nibs of the blades being brought into one adjustment by means of a spring and changed to the other adjustment by pressure from a finger of the hand, substantially as described.

2. A drawing-pen having hinged or jointed blades, a spring acting between said blades, and adjustable stop-screws to regulate the space between the nibs of said blades, substantially as herein described.

3. In a drawing-pen, the combination of two jointed blades having adjustable stop-screws to regulate the space between the nibs of said blades,'said screws being located each side of said joint, with a spring acting between said blades, substantially as described, and for the purpose set forth.

4:. A drawing-pen comprising the blades to and b, jointed at c, the stop-screws c and (.7, and the springf, substantially as described, and for the purpose set forth.

5. A drawing-pen having blades provided with an adjustable stop-screw to regulate the space between the nibs of said blades when they are forced toward each other, and another adjustable stop-screw to regulate the space between the nibs of said blades when said blades are forced apart, substantially as described, and for the purpose set forth.

GEORGE IIENNET 'I.

\Vitnesses:

RoBT. WEBER, ARTHUR L. STEvENs. 

